Cindy, nystatin is a drug we can give orally to dogs. I'd be more concerned with the other ingredients in the powder which could be irritants to the GI tract although significant toxicity isn't likely. Can you tell me the other ingredients which should be listed as "inactive" ingredients?

I understand. The most I'd expect in the way of adverse effects is transient inappetence, vomiting and/or diarrhea. I wouldn't induce emesis or treat in any manner at this time. Any treatment, if necessary, would be supportive and symptomatic - antacid, antiemetic drugs, e.g.

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